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The Yucca Mountain Project: Heater Testing:
The Single Heater Test
- Evaluate THMC coupled processes around a line heater source in fractured tuff.
- Develop testing methodologies and modeling approaches for high-temperature conditions.
- Heating with a 5 m long, 4 kW heater lasted 9 months, starting in 1996 and ending in 1997.
- Borehole sensing and cross-hole testing were used before, during, and after heating period.
- Extent of dryout (about 1 m around the heater hole) was measured with geophysical techniques (ERT, GRP and neutron).
- Condensate zone below the heater was found to be larger than above the heater horizon.
- Chemical composition of water collected during heating in packed borehole intervals was analyzed.
- Characterization data by air-injection tests and mechanical displacement measurements located high-k flow paths.
- Tsang, Y.W. and J.T. Birkholzer, "Predictions and Observations of the Thermal-Hydrological Conditions in the Single Heater Test", Journal of Contaminant Hydrology, vol. 38, 385-425, 1999.